Reininghaus Frank, Korb Thomas, Schoeller Herbert
Institut für Theoretische Physik A, RWTH Aachen, 52056 Aachen, Germany.
Phys Rev Lett. 2006 Jul 14;97(2):026803. doi: 10.1103/PhysRevLett.97.026803.
We study nonequilibrium quantum transport through a mesoscopic wire coupled via local exchange to a ferromagnetic spin chain. Using the Keldysh formalism in the self-consistent Born approximation, we identify fingerprints of the magnetic polaron state formed by hybridization of electronic and magnon states. Because of its low decoherence rate, we find coherent transport signals. Both elastic and inelastic peaks of the differential conductance are discussed as a function of external magnetic fields, the polarization of the leads, and the electronic level spacing of the wire.
我们研究了通过经由局域交换耦合到铁磁自旋链的介观导线的非平衡量子输运。利用自洽玻恩近似下的凯尔迪什形式，我们识别出由电子态和磁振子态杂化形成的磁极化子态的特征。由于其退相干率低，我们发现了相干输运信号。讨论了微分电导的弹性峰和非弹性峰随外部磁场、引线极化以及导线电子能级间距的变化情况。
